Circular knitting machine



p 1931'. P. E. B. SANDER 1,820,989

CIRCULAR KNI TTING MACHINE Filed July 16. 1929 2 Sheets-Sheet 1 Fig.1.

I I I I I III I 2a 3 I I I I 2 5 1 III I I 2 //7I ent0/': 7?; E. ana/e7- Patented sep PATENT OFFICE PAUL ERICH BRUNO SANDER, OF CHEMNITZ, GER-MANY, ASSIGNOR TO GHEMNITZER STRICKMASCHINENFAlBR-IK A. Ga, OF C GERMANY -App1ication filed July 16, 1929, Seria1 No.

"'- in recesses in the indentations of the needle bed, or the needles themselves are carried by a conveyor device such as a guiderailv out of these recesses to a pattern apparatus which forces back the jacks or the needles which are not to operate intotheir recesses and withdraws them from the range of action of the cam surface in the cam cylinder. The jacks or needles not acted upon by the 1 pattern apparatus are guided up ever, say a cam and return over a second cam surface, or similar guiding device, to their initial position. All the jacks or needles now lie in the indentation of the needle bed until :they are ca'rriedby asucceeding guiding device to a pattern apparatus.

, According to the. present invention, the

jacks or needles not actedupon by the patternapparatus, after passing the two guid- )3 ing devices, cams say, over which they pass,

i are not again brought back into the initial position by means of a second cam but the jacks or needles, after their sorting by the pattern apparatus into two groupsand after each passage, say, a needle actuating cam,

are re-grouped by positioning devices provided one for each group so that at the next cam the jacks or needles are actuated which were not actuated in the preceding series of j operations, and vice versa.

- Instead of carrying, as with known circular knitting machines, the separate acks or needles by meansof a special guiding devicefrom their initial positions to each pattern apparatus, and after their passage over or through the needle actuating means ofbringing them all back into the initial position by means of asecond guiding device, according to the invention the jacks er needles not acted on by the pattern ap-' 'paratus as in my German Patent No. 484,191,

after passing over or through the actuating means may remainin position and the jacks or needles forced back by the pattern apparatus into the initial position can be brought forward by a positioning device.

HEMNITZ, GERMANY, A CORPORATION OF CIRCULAR KNITTING MACHINE 378,597, and in Germany July 18, 1928.

with the known circular knitting machine may also, according to the invention, be entirely dispensed with as the ]ttCl S or needles sorted in any desired manner by hand are brought by the positioning device in groups alternately in and out of engagement with the successive actuating means.

In the drawings actuating means with positioning devices constructed according to the invention are shown as examples 2- Figure 1 shows the arrangement of a cam guide provided behind the pattern apparatus for the jacks or needles sorted into two groups, as an example, in perspective.

Figure 2 shows another arrangement of the cam guide.

Figure 3 shows two of the cam surfaces disposed in succession around. the needle bed with the. jacks in their range, in perspective, and

Figure 4 shows the parts shown in Figure 3 in horizontal section.

With the circular knitting machines with cams as shown in Figure 1, 1 is a cam surface provided behind a pattern apparatus. The jacks have been sorted into two groups by the pattern apparatus, not shown in the cam surface 1. Positioning devices 3, 4 are now provided in the path of both jack groups which put the two groups alternately into the working or stationary position. -The 1. The jacks 2- of jacks 2 which do not pass over the cam 1 are guided by the positioning boss 3 shaped as shown, into the working position, that is, into the advanced position, so that they pass up the succeeding cam. The jac 2 which have passed over the cam 1 are brought into the normal inoperative position shortly before leaving the cam, by the positioning boss 4:,that is, to say, they are forced back into the indentations of the needle cylinder, so that they cannot pass over the succeeding following cam. This process is repeated mutatis mutandis in front of each succeeding cam.

With an arrangement of the positioning devices shown'in Figure Q, 1 is a cam ar ranged behind the pattern apparatus. The jacks 2 forced back by the pattern apparatus into the-normal position, that is, into the needle bedindentations, do not pass over'the cam, as the heels 2a/do not stand out far enough. The cam is only passed over by the jacks 2 which have not been forced back into the normal inoperative position by the pattern apparatus, sothat theirheels 2410 extend far enough forward to pass up the cam which the heels do not 1 are caused to move for- 3 from their The positionpass over the cam ward by the positioning boss normal inoperative position.

ing boss 3 is so arranged that viewed in the direction of rotation of the jacks it is slightly outwardly inclined, so that the ac ks 2, the recesses 5 on the heels 2a of wlncn engage the boss are forced outwards.

In order that the jacks 2 which pass oyer the cam 1, may all take up the same position as the needle feelers 2 brought forward out of the normal inoperative position by the action of the position boss 3, a further second positioning boss end of the cam surface which prevents the jacks on the dowiward movement sliding into the deeper indentations of the needle cylinder,and thus getting out of the working position. In the forward position all the jacks are then carried to a Iurther'pattern apparatus.

lVith the form of construction of the circular knitting machineaccording to Figures 11 the needles B are moved inwards by the positioning boss 8, while the needles A not operated by the cam II, are again carried outwards by the positioning boss 9.

The sorting of the needles may take place in any desired manner, as forexample by 1 is provided at the What I claim and desire to secure by Letters Patent of the United States is 1. A needle cylinder for a circular knitting machine, having, with successive cams, a plain groovefor jacks and successive cam grooves for jacks, each of said camgrooves including an upward incline from the plain groove and a downward incline thereto, means in the plain groove below each of the camsfor moving the jackswhich pass in such groove, laterally outwardly therein into a position in which they will engage the upward incline of the next succeeding cam groove, and means on the downward incline of each 'cam groove for moving the jacks which pass in such groove, laterally inward- 1y therein into a position in which they will escape engagement with the upward incline of the next succeeding cam groove.

2. needle cylinder for acircular knitting machine, having, with successive cams, a plain groove for receiving the heel parts of jacks and successive cam grooves for receiving the heel parts of jacks, each of said cam grooves including an upward incline from the plain groove and a'downward incline thereto, an elongated boss memberin the plain groove below each of the cams for engaging jack heels and switching them laterally outwardly into a position in which they will engage the upward incline of the next succeeding cam groove, and an elongated boss member on the downward incline of, each cam groove for engaging the jack heels and switching them laterallyinwardly into a position in which they will escape engagement with'the upward incline of the next succeeding cam groove.

8. A needle cylinder for a circular knitting machine, having, with successive cams, a plain groove for jacks and successive cam grooves for jacks, each of said cam grooves including an upward incline from the plain groove and a downward incline thereto, means in cooperation with the jacks for in- 11s tervally switching the same, said means consisting of heels on the jacks for engaging the grooves and notches, and elongated bosses in the grooves for engaging notches, certain of said bosses being in the plain groove and arranged in an oblique outwardly'extending direction therein to switch the heels outwardly into a 'positionfor engagement with the next'succeeding upward incline, and

PAUL ERIGH BRUNO SANDER. 

